Heat-Resistant 3D Printer Filament
PLA softens in a hot car. Here's what holds up to heat, ranked by service temperature, with live prices.
Last updated: June 2026
Heat resistance is where the cheap filaments fall down. PLA starts softening around 60C, which a parked car or a sunny windowsill beats easily, and PETG only reaches about 75C. For anything that gets genuinely hot, you need an engineering material.
Ranked by how much heat they shrug off: PC leads at roughly 110C, ABS and ASA sit around 95-100C (ASA adds UV resistance), and nylon is strong and heat-tolerant but demands drying. All of them want an enclosure to print well, so heat resistance comes with a bit more setup.
PC tolerates around 110C and is the toughest common filament too, which makes it the pick when a part must survive real heat and load. It needs an enclosure, a 300C hotend and drying, so it's a commitment.
ASA handles about 95C and is UV-stable, so it's the go-to for hot outdoor parts like car exterior trim and signage. It prints like ABS, so an enclosure and ventilation help.
ABS reaches roughly 100C and is cheap, which makes it a solid choice for indoor hot parts where UV isn't a factor. It warps without an enclosure and gives off fumes, so ventilate and enclose it.
Nylon is heat-tolerant and extremely tough, good for gears and mechanical parts that also run warm. The trouble is it absorbs moisture fast, so drying is mandatory for decent results.
PLA (softens around 60C) and PETG (around 75C) aren't heat-resistant materials. If a part will sit in a hot car, in direct sun, or near a heat source, skip them and start with ASA or PC. PCTG and PETG-CF buy a little more headroom than plain PETG but not much.